.mermaid-panel{border:1px solid var(--line);background:var(--soft);min-width:0;max-width:100%;color:var(--ink);border-radius:12px;margin:16px 0;padding:12px}.diagram-tools{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:10px;display:flex}.diagram-tools strong{margin-right:auto}.diagram-tools button,.diagram-tools a{border:1px solid var(--line);background:var(--soft);color:var(--ink);border-radius:7px;padding:7px 10px;font-size:12px;text-decoration:none}.diagram-viewport{background:#fff;border-radius:8px;max-width:100%;overflow:auto}.diagram-viewport img{height:auto;margin:auto;display:block}.mermaid-panel details{min-width:0;margin-top:12px}.mermaid-panel summary{cursor:pointer;font-size:13px}.diagram-source-label{gap:8px;margin:12px 0;font-size:13px;display:grid}.diagram-source-label textarea{resize:vertical;border:1px solid var(--line);background:var(--soft);width:100%;min-width:0;min-height:180px;color:var(--ink);border-radius:8px;padding:12px;font:13px/1.6 monospace}.mermaid-panel small{color:var(--muted);font-size:12px}